摘要
研究以板翅式主液化换热器(PFHE)为核心的DMR双混合制冷剂LNG液化工艺:预冷段采用重组分高沸点C2H6-C3H8-C4H10三元混合制冷剂节流制冷循环,液化及过冷段采用轻组分低沸点CH4-C2H4-N2三元混合制冷剂制冷循环;PFHE型DMR液化流程采用三级板翅式换热器作为主液化装置,内含两段相对独立的三元混合制冷剂制冷循环。结果表明,PFHE型DMR液化工艺可以完全替代缠绕管式(MCHE型)DMR液化工艺,与C3/MR工艺相比可有效地提高系统的制冷效率;三级PFHE结构简单紧凑,换热效率高,比MCHE型DMR液化工艺具有更高的传热效率,主换热面积更小。
Research on LNG liquefaction process with double mixed refrigerant(DMR)based on the main plate-fin heat exchanger(PFHE)is carried out:The ternary mixed refrigerant of C2H6-C3H8-C4H10 with heavy components and high boiling point were used for throttling refrigeration cycle in precooling stage,and the ternary mixed refrigerant of CHC2H4-N2 with light components and low boiling point were used for throttling refrigeration cycle in liquefaction and supercooled stages.The three-stage plate-fin heat exchanger was used as the main liquefaction equipment in PFHE-DMR liquefaction process contained two relatively independent refrigeration cycles with ternary mixed refrigerant.The results show that the PFHE-DMR liquefaction process can entirely replace MCHE-DMR liquefaction process.Compared with C3/MR liquefaction process,it can effectively improve the refrigeration efficiency.The three-stage PFHE with simple and compact structure has higher heat transfer efficiency and smaller heat transfer area when compared with three-stage MCHE.
作者
王军强
张周卫
汪雅红
陈联
殷丽
WANG Junqiang;ZHANG Zhouwei;WANG Yahong;CHEN Lian;YIN Li(School of Environment and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Research Institute of LNG cryogenic equipment and Automation,Lanzhou Jiaotong University,Lanzhou 730070,China;Lanzhou Institute of Physics,Lanzhou 730000,China)
出处
《真空与低温》
2020年第2期125-130,共6页
Vacuum and Cryogenics
基金
国家自然科学基金(405249)
甘肃省重点人才项目(2660010)。
关键词
液化天然气
板翅式主换热器
双混合制冷剂
缠绕式主换热器
liquefied natural gas(LNG)
the main plate-fin heat exchanger(PFHE)
double mixed refrigerant(DMR)
the main coil wound heat exchanger(MCHE)
作者简介
王军强(1992-),男,甘肃省天水市人,硕士,主要从事液化天然气(LNG)系列工艺装备及空间低温制冷技术研究。E-mail:1071124579@qq.com;通信作者:张周卫(1974-),男,甘肃省静宁县人,工学博士,教授,主要从事液化天然气(LNG)系列工艺装备及空间低温制冷技术研究。E-mail:zhangzwemail@126.com。
